Book Image

jQuery Design Patterns

By : Thodoris Greasidis
Book Image

jQuery Design Patterns

By: Thodoris Greasidis

Overview of this book

jQuery is a feature-rich JavaScript library that makes HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a variety of browsers. With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript. jQuery solves the problems of DOM manipulation, event detection, AJAX calls, element selection and document queries, element attribute and data management, as well as object management utilities. This book addresses these problems and shows you how to make the best of jQuery through the various design patterns available. The book starts off with a refresher to jQuery and will then take you through the different design patterns such as facade, observer, publisher/subscriber, and so on. We will also go into client-side templating techniques and libraries, as well as some plugin development patterns. Finally, we will look into some best practices that you can use to make the best of jQuery.
Table of Contents (18 chapters)
jQuery Design Patterns
About the Author
About the Reviewer

Chapter 3. The Publish/Subscribe Pattern

In this chapter, we will showcase the Publish/Subscribe Pattern, a design pattern quite similar to the Observer Pattern but with a more distinct role that is a better fit for more complex use cases. We will see how it differs from the Observer Pattern and how jQuery adopted some of its concepts and brought them to its Observer Pattern implementation.

Later, we will proceed and rewrite our previous chapter's example using this pattern. We will use this pattern's benefits to add some extra features and also reduce the coupling of our code with the elements of the web page.

In this chapter, we will:

  • Introduce the Publish/Subscribe Pattern

  • Learn how it differs and what advantages it has over the Observer Pattern

  • Learn how jQuery brings some of its features to its methods

  • Learn how to emit custom events with jQuery

  • Rewrite and extend the example from Chapter 2, The Observer Pattern, using this pattern